Overview
The Brain Coral (Open) (Trachyphyllia geoffroyi) is a intermediate saltwater species known for its red, green, blue (vivid multi-color) coloration. Sits on sand bed. On substrate.
Origin & Appearance
Origin: Indo-Pacific.
Colors: Red, Green, Blue (vivid multi-color).
Body Shape: Coral Colony (mound/boulder). Typical adult dimensions: 20.0 x 16.0 x 12.0.
Sexual Dimorphism: N/A; colonial.
Tank & Water Requirements
| Min Tank Size | 20 gallons |
| Temperature | 75–81°F |
| pH Range | 8.1–8.4 |
| Water Hardness (GH) | dKH 8-12 |
| Bioload | low |
| Oxygen Demand | medium |
| Plant Safe | yes |
| Aquarium Position | On substrate |
Behavior & Activity
Sessile; fleshy tissue inflates dramatically during day; can extend feeder tentacles at night; sits on sand bed
Speed: 0/100Aggression: 3/10diurnalSchooling (6+)
Breeding
Fragging (asexual); broadcast spawning (sexual)
Common Diseases
💊 Brown jelly disease💊 tissue recession💊 pests
Expert Notes
Sits on sand bed; many color morphs